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Background HIV-1 co-receptor usage may play a critical role in AIDS pathogenesis. Information on viral tropism in HIV-1 seroconverters is scarce, as is the relationship with transmission of drug-resistant viruses. Methods All consecutive HIV-1 seroconverters seen between January 1997 and December...
Objectives DNA topoisomerases utilize a covalent complex formed after DNA cleavage as an intermediate in the interconversion of topological forms via DNA cleavage and religation. Many anticancer and antibacterial therapeutic agents are effective because they stabilize or increase the level of the...